Integrated Circuits (ICs)

LM2671N-ADJ/NOPB

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8V TO 40V, 500MA SIMPLE SWITCHER® BUCK CONVERTER WITH 5 EXTERNAL COMPONENTS

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Search across all available documentation for this part.

DocumentsInput and Output Capacitor Selection Simple Techniques Minimize Cross-Coupling in Distributed Power Systems +15

Integrated Circuits (ICs)

LM2671N-ADJ/NOPB

Active

Texas Instruments

8V TO 40V, 500MA SIMPLE SWITCHER® BUCK CONVERTER WITH 5 EXTERNAL COMPONENTS

Deep-Dive with AI

DocumentsInput and Output Capacitor Selection Simple Techniques Minimize Cross-Coupling in Distributed Power Systems +15

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM2671N-ADJ/NOPB

Current - Output	500 mA
Frequency - Switching	260 kHz
Function	Step-Down
Mounting Type	Through Hole
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	0.3 in
Package / Case	8-DIP
Package / Case	7.62 mm
Supplier Device Package	8-PDIP
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Min) [Min]	6.5 V
Voltage - Output (Max)	37 V
Voltage - Output (Min/Fixed)	1.21 V

LM2671 Series

Part	Voltage - Output (Min/Fixed)	Package / Case	Package / Case [y]	Package / Case [x]	Voltage - Input (Min) [Min]	Function	Frequency - Switching	Operating Temperature [Min]	Operating Temperature [Max]	Number of Outputs	Output Type	Topology	Output Configuration	Current - Output	Supplier Device Package	Mounting Type	Output Type	Voltage - Output (Max)	Package / Case	Package / Case
Texas Instruments LM2671M-5.0/NOPB	5 V	8-SOIC	3.9 mm	0.154 in	6.5 V	Step-Down	260 kHz	-40 °C	125 ¯C	1	1.81 mOhm	Buck	Positive	500 mA	8-SOIC	Surface Mount
Texas Instruments LM2671M-5.0	5 V	8-SOIC	3.9 mm	0.154 in	6.5 V	Step-Down	260 kHz	-40 °C	125 ¯C	1	1.81 mOhm	Buck	Positive	500 mA	8-SOIC	Surface Mount
Texas Instruments LM2671M-3.3	3.3 V	8-SOIC	3.9 mm	0.154 in	6.5 V	Step-Down	260 kHz	-40 °C	125 ¯C	1	1.81 mOhm	Buck	Positive	500 mA	8-SOIC	Surface Mount
Texas Instruments LM2671LD-ADJ/NOPB	1.21 V	16-WFDFN Exposed Pad			6.5 V	Step-Down	260 kHz	-40 °C	125 ¯C	1		Buck	Positive	500 mA	16-WSON (5x5)	Surface Mount	Adjustable	37 V
Texas Instruments LM2671N-3.3	3.3 V	8-DIP			6.5 V	Step-Down	260 kHz	-40 °C	125 ¯C	1	1.81 mOhm	Buck	Positive	500 mA	8-PDIP	Through Hole			0.3 in	7.62 mm
Texas Instruments LM2671MX-3.3/NOPB	3.3 V	8-SOIC	3.9 mm	0.154 in	6.5 V	Step-Down	260 kHz	-40 °C	125 ¯C	1	1.81 mOhm	Buck	Positive	500 mA	8-SOIC	Surface Mount
Texas Instruments LM2671N-ADJ/NOPB	1.21 V	8-DIP			6.5 V	Step-Down	260 kHz	-40 °C	125 ¯C	1		Buck	Positive	500 mA	8-PDIP	Through Hole	Adjustable	37 V	0.3 in	7.62 mm
Texas Instruments LM2671LD-5.0/NOPB	5 V	16-WFDFN Exposed Pad			6.5 V	Step-Down	260 kHz	-40 °C	125 ¯C	1	1.81 mOhm	Buck	Positive	500 mA	16-WSON (5x5)	Surface Mount
Texas Instruments LM2671N-12	12 V	8-DIP			6.5 V	Step-Down	260 kHz	-40 °C	125 ¯C	1	1.81 mOhm	Buck	Positive	500 mA	8-PDIP	Through Hole			0.3 in	7.62 mm
Texas Instruments LM2671LD-ADJ	1.21 V	16-WFDFN Exposed Pad			6.5 V	Step-Down	260 kHz	-40 °C	125 ¯C	1		Buck	Positive	500 mA	16-WSON (5x5)	Surface Mount	Adjustable	37 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 5.71
		10	$ 3.83
		25	$ 3.35
		100	$ 2.80
		250	$ 2.54
		500	$ 2.38
		1000	$ 2.25
		2500	$ 2.10
Texas Instruments	TUBE	1	$ 3.32
		100	$ 2.91
		250	$ 2.04
		1000	$ 1.65

Description

General part information

LM2671 Series

The LM2671 series of regulators are monolithic integrated circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 500-mA load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation, fixed frequency oscillator, external shutdown, soft start, and frequency synchronization.

The LM2671 series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter components than what is required with lower frequency switching regulators. Because of its very high efficiency (> 90%), the copper traces on the printed-circuit board are the only heat sinking required.

Documents

Technical documentation and resources

LM2671N-ADJ/NOPB

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LM2671N-ADJ/NOPB

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Technical Specifications

LM2671 Series

Pricing

Description

LM2671 Series

Documents

Input and Output Capacitor Selection

Simple Techniques Minimize Cross-Coupling in Distributed Power Systems

AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)

AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)

AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)

Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)

AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)

Semiconductor and IC Package Thermal Metrics (Rev. D)

LM2671 SIMPLE SWITCHER Power Converter High Efficiency 500-mA Step-Down Voltage Regulator With Features datasheet (Rev. L)

AN-1187 Leadless Leadframe Package (LLP) (Rev. R)

AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)

AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E)

AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)

AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)

AN-643 EMI/RFI Board Design (Rev. B)

AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)

AN-1197 Selecting Inductors for Buck Converters (Rev. B)

LM2671 Series